PBDB Timescale

Obsolete Names for ICS Units

The interval definitions in this timescale are derived from the following sources:

W. B. Harland, R. L. Armstrong, A. V. Cox, L. E. Craig, A. G. Smith and D. G. Smith. 1990. A Geologic Time Scale 1989. view
K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
F. M. Gradstein, F. P. Agterberg, J. G. Ogg, J. Hardenbol, P. Van Veen, J. Thierry, and Z. Huang. 1995. A Triassic, Jurassic, and Cretaceous time scale. SEPM Special Publication 54 view
J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 view

There are 55 timescales which overlap this one. show

Interval boundaries marked with * have been interpolated based on the differences between the ages for international timescale boundaries quoted in the source and the currently accepted ages for those boundaries.

Interval names marked with † are no longer in current use.

This timescale is used in the definition of 92 collections

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International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Silurian of North America			Permian of North America		Cambrian of Australia	Mesozoic Subages		Devonian of Germany	Permian of the Pamirs	Permian of the Russian Platform
Neogene	Pliocene	Piacenzian	Tertiary †														2.58
	Pliocene	Zanclean															3.6
	Miocene	Messinian															5.333
		Tortonian															7.246
		Serravallian															11.63
		Langhian															13.82
		Burdigalian															15.98
		Aquitanian															20.44
Paleogene	Oligocene	Chattian															23.03
	Oligocene	Rupelian															27.82
	Eocene	Priabonian															33.9
		Bartonian															37.71
		Lutetian															41.2
		Ypresian															47.8
	Paleocene	Thanetian															56
		Selandian															59.2
		Danian															61.6
Cretaceous	Late Cretaceous	Maastrichtian										Late Maastrichtian/Early Maastrichtian					66
		Campanian										Late Campanian/Middle Campanian/Early Campanian					72.1
		Santonian										Late Santonian/Middle Santonian/Early Santonian					83.6
		Coniacian										Late Coniacian/Middle Coniacian/Early Coniacian					86.3
		Turonian										Late Turonian/Middle Turonian/Early Turonian					89.8
		Cenomanian										Late Cenomanian/Middle Cenomanian/Early Cenomanian					93.9
	Early Cretaceous	Albian										Late Albian					100.5
												Middle Albian					106.2 *
												Early Albian					109.9 *
		Aptian										Late Aptian					113
		Aptian										Early Aptian					119.5 *
		Barremian										Late Barremian/Early Barremian					121.4
		Hauterivian										Late Hauterivian/Early Hauterivian					125.77
		Valanginian										Late Valanginian/Early Valanginian					132.6
		Berriasian										Late Berriasian					139.8
												Middle Berriasian					140.6 *
												Early Berriasian					142.7 *
Jurassic	Late Jurassic	Tithonian										Late Tithonian	Middle Tithonian				145
		Tithonian										Early Tithonian	Middle Tithonian				146.3 *
		Kimmeridgian										Late Kimmeridgian					149.2
		Kimmeridgian										Early Kimmeridgian					152.2 *
		Oxfordian										Late Oxfordian	Middle Oxfordian/Early Oxfordian				154.8
		Oxfordian											Middle Oxfordian/Early Oxfordian				157.9 *
	Middle Jurassic	Callovian										Late Callovian/Middle Callovian/Early Callovian					161.5
		Bathonian										Late Bathonian/Middle Bathonian/Early Bathonian					165.3
		Bajocian										Late Bajocian					168.2
		Bajocian										Early Bajocian					168.6 *
		Aalenian										Late Aalenian/Middle Aalenian/Early Aalenian					170.9
	Early Jurassic	Toarcian										Late Toarcian					174.7
												Middle Toarcian					180.4 *
												Early Toarcian					182.9 *
		Pliensbachian										Late Pliensbachian/Early Pliensbachian					184.2
		Sinemurian										Late Sinemurian/Early Sinemurian					192.9
		Hettangian										Late Hettangian/Middle Hettangian/Early Hettangian					199.5
Triassic	Late Triassic	Rhaetian															201.4
		Norian										Sevatian					208.5
												Alaunian					213.2 *
												Lacian					216.7 *
		Carnian										Tuvalian					227
		Carnian										Julian					233.4 *
	Middle Triassic	Ladinian										Longobardian					237
		Ladinian										Fassanian					239.7 *
		Anisian										Illyrian					242
												Pelsonian					243.8 *
												Bithynian					244.7 *
												Aegean					245.5 *
	Early Triassic	Olenekian										Spathian					247.2
		Olenekian		Smithian	248.9 *
		Induan		Dienerian	251.2
		Induan		Griesbachian	251.4 *
Permian	Lopingian	Changhsingian			Dorashamian	251.902
		Wuchiapingian			Longtanian †	Dzhulfian	254.14
		Wuchiapingian			Longtanian †	Dzhulfian	Tatarian	Vyatkian	256.8 *
	Guadalupian	Capitanian				Capitanian		Midian	Severodvinian	259.51
		Wordian				Wordian		Midian	Urzhumian	264.28
		Wordian				Wordian		Murgabian	Urzhumian	266.2 *
		Roadian				Roadian	Kazanian		Povolzhian	266.9
		Roadian				Roadian	Kazanian		Sokian	270.7 *
	Cisuralian	Kungurian				Leonardian	Cathedralian	Kubergandian	Kungurian	Irenian/Ufimian	273.01
								Kubergandian		Filipovian	276.5 *
								Bolorian		Filipovian	279.8
										Saraninian	280.1 *
							Hessian			Saraninian	281.9 *
		Artinskian							Artinskian	Sarginian	283.5
			Irginian							285.9 *
								Yakhtashian		286
						Wolfcampian	Lenoxian			286.1 *
			Burtsevian							287.8 *
		Sakmarian	Sakmarian					Sakmarian	Sterlitamakian	290.1
		Sakmarian	Sakmarian					Sakmarian	Tastubian	291.7 *
		Asselian	Nealian				Asselian	Asselian	Shikhanian	293.52
									Uskalykian	294.8
									Surenian	297.5
Carboniferous	Pennsylvanian	Gzhelian								298.9
		Kasimovian								303.7
		Moscovian								307
		Bashkirian								315.2
	Mississippian	Serpukhovian								323.2
		Visean								330.9
		Tournaisian								346.7
Devonian	Late Devonian	Famennian								Wocklum/Dasberg/Hemberg/Nehden	358.9
	Late Devonian	Frasnian								Adorf	372.2
	Middle Devonian	Givetian								Givetian	382.7
	Middle Devonian	Eifelian								Eifelian	387.7
	Early Devonian	Emsian								Emsian	393.3
		Pragian								Siegen	407.6
		Lochkovian								Gedinnine	410.8
Silurian	Pridoli									Cayugan		419.2
	Pridoli									Niagaran		422.5 *
	Ludlow	Ludfordian										423
	Ludlow	Gorstian										425.6
	Wenlock	Homerian										Lockportian	427.4
	Wenlock	Sheinwoodian											430.5
	Llandovery	Telychian										Ontarian	433.4
		Aeronian											438.5
													Alexandrian	438.7 *
										Medinan		Clinton		440.1 *
														440.7 *
		Rhuddanian												440.8
Ordovician	Late Ordovician	Hirnantian												443.8
		Katian												445.2
		Sandbian												453
	Middle Ordovician	Darriwilian												458.4
	Middle Ordovician	Dapingian												467.3
	Early Ordovician	Floian												470
	Early Ordovician	Tremadocian												477.7
Cambrian	Furongian	Stage 10												Datsonian	485.4
		Stage 10												Payntonian	486.8 *
		Jiangshanian												Iverian	489.5
		Paibian												Idamean	494
	Miaolingian	Guzhangian												Series 3 †	Mindyallan	497
		Guzhangian													Boomerangian	499
		Drumian													Undillan	500.5
		Drumian													Floran	503
		Wuliuan		Stage 5 †	Templetonian										504.5
		Wuliuan		Stage 5 †	Ordian										507.8 *
	Series 2	Stage 4			Ordian										509
																	510.8 *